Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:40:38 2013

Optimize a model with 320 rows, 6120 columns and 57310 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.25s
Presolved: 310 rows, 6110 columns, 52300 nonzeros
Variable types: 6020 continuous, 90 integer (90 binary)

Root relaxation: objective 2.337984e+04, 142 iterations, 0.02 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 23379.8401    0    3          - 23379.8401     -      -    0s
     0     0 23380.0691    0    3          - 23380.0691     -      -    0s
     0     0 23505.3359    0    6          - 23505.3359     -      -    0s
     0     0 23505.3359    0    6          - 23505.3359     -      -    0s
H    0     0                    23620.127542 23505.3359  0.49%     -    1s
     0     2 23505.3359    0    6 23620.1275 23505.3359  0.49%     -    1s
*   20    11              20    23530.470555 23511.8406  0.08%   6.3    1s
H   27     0                    23529.637347 23527.1077  0.01%   5.7    1s
*   39     8              17    23528.191877 23527.2177  0.00%   5.0    1s

Cutting planes:
  Flow cover: 1

Explored 40 nodes (536 simplex iterations) in 1.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.352819187677e+04, best bound 2.352721773095e+04, gap 0.0041%